Abstract:
The present invention discloses, inter alia, a micro-electromechanical device (MEMD) for sensing and for harvesting electrical energy responsive to being subjected to mechanical forces, comprising at least one first conductive element fixedly mounted on a first support, wherein the at least one first conductive element is chargeable with electrons; and at least one second conductive element inertia-mounted on a second support such that the first and second supports are electrically isolated from each other.
Abstract:
A micro-machined switchable optical mirror device with a fast response speed. The mirror device includes a substrate defining a gap space, and a mirror assembly disposed on the substrate and deflectable in the gap space, the mirror assembly including a free end cantilever and a reflector on the cantilever, wherein the cantilever is anchored on the substrate adjacent a side of the gap space through an elastic member. In one aspect, the mirror device further includes a stop spring at an end of the cantilever opposing the elastic member.
Abstract:
The present subject matter relates to systems, devices, and methods for reducing surface dielectric charging in a RF MEMS actuator element. In particular, a micro-electro-mechanical systems (MEMS) can comprise a fixed electrode positioned on a substrate, a moveable electrode positioned substantially above the fixed electrode and separated from the fixed electrode by a gap, and at least one standoff bump positioned between the fixed electrode and the moveable electrode, wherein the at least one standoff bump extends into the gap. In this configuration, one or both of the fixed electrode or the moveable electrode can be patterned to define one or more hole that is substantially aligned with the one or more of the at least one standoff bump. The bump and the hole can both help to reduce the rate of surface dielectric charging and the total amount of charge generated.
Abstract:
Methods of manufacturing a substrate unit that achieve improved levels of efficiency and/or longevity are disclosed. The substrate units may be used for example in solar cells, semiconductor detectors or electrostatic actuators, sensors, harvesters or other electro-mechanical devices. Disclosed methods include the steps of generating, or redistributing into the bulk of the dielectric film, a region of net charge in the dielectric film while the dielectric film is at a temperature greater than 150°C.
Abstract:
Es wird ein elektrostatische Aktuator mit einer stationären Elektrode 14 und einem einseitig fest eingespannten Bieger 22' beschrieben, wobei der Bieger 22' eine Auslegerelektrode 29 umfasst, die der stationären Elektrode 14 in einem Überlappungsbereich gegenüberliegend angeordnet ist und in Richtung der stationären Elektrode 14 auslenkbar ist.
Abstract:
The present invention relates to a method of manufacturing a capacitive micro- machined transducer (100), in particular a CMUT, the method comprising depositing a first electrode layer (10) on a substrate (1), depositing a first dielectric film (20) on the first electrode layer (10), depositing a sacrificial layer (30) on the first dielectric film (20), the sacrificial layer (30) being removable for forming a cavity (35) of the transducer, depositing a second dielectric film (40) on the sacrificial layer (30), depositing a second electrode layer (50) on the second dielectric film (40), and patterning at least one of the deposited layers and films (10, 20, 30, 40, 50), wherein the depositing steps are performed by Atomic Layer Deposition. The present invention further relates to a capacitive micro-machined transducer (100), in particular a CMUT, manufactured by such method.
Abstract:
Dispositif à poutre suspendue et moyens de détection piézorésistive du déplacement de celle-ci, et procédé de fabrication du dispositif. Le dispositif comprend: un support (14); une poutre suspendue (16), se déplaçant parallèlement au plan du support; et des moyens (18) de détection du déplacement, comprenant au moins deux jauges piézorésistives (20, 22) qui ne sont pas dans le prolongement l'une de l'autre. La poutre est suspendue par l'intermédiaire des moyens de détection. Selon l'invention, les deux jauges sont respectivement situées sur deux faces latérales opposées de la poutre.
Abstract:
A device (110) includes a sensing element (26) having drive nodes (34, 36) and sense nodes (42, 44). Parasitic capacitance (22) is present between drive node (34) and sense node (42). Likewise, parasitic capacitance (24) is present between drive node (36) and sense node (44). When a drive signal (56) is applied between drive nodes (34, 36), a parasitic current (70) between drive and sense nodes (34, 42) and a parasitic current (72) between drive and sense nodes (36,44) is created due to the parasitic capacitances (22, 24). A capacitive network (112) is coupled between the drive node (36) and the sense node (42) to create a correction current (134) through capacitive network (112) that cancels parasitic current (70). Likewise, a capacitive network (114) is coupled between the drive node (34) and the sense node (44) to create a correction current (138) through capacitive network (112) that cancels parasitic current (72).